The USPS lookup is showing the wrong amounts. It shows $2.77 for both one and two pound packages going by media mail. The amounts the cart returns for all services we use - media, priority, and express - are all above the amounts shown on our postage meter and the USPS website. Priority and express are not over according to the next pound increment; frankly I can't find a constant to express that difference!

Does anyone have any suggestions as to what direction to go looking for the fix to this issue? I have been going in circles for days and I need to get this site going.

better you compare the price showing at http://postcalc.usps.gov/ and the price returned by your vpasp site. See how much different in the price of same destination, origin location, package chosen etc...